The Co-cathedral of Christ the King stands at Krunska 23 in Belgrade and is a co-cathedral of the Roman Catholic Archdiocese of Belgrade. Negotiations between the Holy See and the Serbian government for a church began in 1914. Construction began in 1924, and the Apostolic Nuncio consecrated the church that year as St. Ladislaus. It was expanded to its present size in 1926 and dedicated to Christ the King in 1928.
The interior has three naves with barrel vaults, white Carrara marble and stained-glass windows. A mosaic of Christ Blessing sits in the lunette of the portal. Franc Jenko built the organ in 1927.
In 1988 the new Cathedral of the Blessed Virgin Mary was consecrated, and this church became a co-cathedral. It is described as the oldest Catholic place of worship in Belgrade.

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